Is this worth anything?
My opinion:
It is certainly not bad to be zend-certified. However I have never seen it to be required when reading the "job advertisements". I would say such a certificate is "nice to have" and why not get the certificate if you have the skills?
But to raise your value on the IT-job-market I would suggest to get an Oracle-certificate, Java-certificate, UNIX/LINUX-certificate before getting a PHP-certificate (simply by the facts of what I read in the job-market).
But then again... it always depends in which area you work.
How hard this zend-certificate is?
-> no idea!
cheers!
- leonard